<p><P>The origins of turbulent flow and the transition from laminar to turbulent flow are the most important unsolved problems of fluid mechanics and aerodynamics. Besides being a fundamental question of fluid mechanics, there are numerous applications relying on accurate information regarding trans
IUTAM Symposium on Laminar-Turbulent Transition
β Scribed by M. Gaster (auth.), Rama Govindarajan (eds.)
- Publisher
- Springer
- Year
- 2006
- Tongue
- English
- Leaves
- 456
- Edition
- 1
- Category
- Library
No coin nor oath required. For personal study only.
β¦ Synopsis
The dynamics of transition from laminar to turbulent flow remains to this day a major challenge in theoretical and applied mechanics. A series of IUTAM symposia held over the last twenty five years at well-known Centres of research in the subject - Novosibirsk, Stuttgart, Toulouse, Sendai and Sedona (Arizona) - has proved to be a great catalyst which has given a boost to research and our understanding of the field. At this point of time, the field is changing significantly with several emerging directions. The sixth IUTAM meeting in the series, which was held at the Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India, focused on the progress after the fifth meeting held at Sedona in 1999. The s- posium, which adhered to the IUTAM format of a single session, included seven invited lectures, fifty oral presentations and eight posters. During the course of the symposium, the following became evident. The area of laminar-turbulent transition has progressed considerably since 1999. Better theoretical tools, for handling nonlinearities as well as transient behaviour are now available. This is accompanied by an en- mous increase in the level of sophistication of both experiments and direct numerical simulations. The result has been that our understanding of the early stages of the transition process is now on much firmer footing and we are now able to study many aspects of the later stages of the transition process.
β¦ Table of Contents
LAMINAR SEPARATION BUBBLES....Pages 1-13
TRANSIENT GROWTH WITH APPLICATION BYPASS TRANSITION TO....Pages 15-24
THE ROLE OF EXTERNAL DISTURBANCES INLAMINAR-TURBULENT TRANSITION....Pages 25-35
MODELING THE EFFECTS OF STEPS ON BOUNDARY-LAYER TRANSITION....Pages 37-44
RECENT OBSERVATIONS OF THE TRANSITION TO TURBULENCE IN A PIPE....Pages 45-55
LOCALISED INSTABILITY IN UNSTEADY SEPARATION BUBBLES....Pages 57-70
INTERACTION OF SEPARATION AND TRANSITION IN BOUNDARY LAYERS: DIRECT NUMERICAL SIMULATIONS....Pages 71-88
ON FUNDAMENTAL INSTABILITY MECHANISMS OF NOMINALLY 2-D SEPARATION BUBBLES....Pages 89-95
A NEW STABILITY APPROACH FOR THE FLOW INDUCED BY WALL INJECTION....Pages 97-102
THE PECULIARITIES OF DEVELOPMENT OFFORERUNNERS ON LONGITUDINAL STRUCTURES FRONTS IN THE BOUNDARY LAYER OF A STRAIGHT WING....Pages 103-108
OBSERVATION OF NONLINEAR TRAVELLING WAVES IN TURBULENT PIPE FLOW....Pages 109-114
A STRANGE INSTABILITY WITH GROWTH NORMAL TO A BOUNDARY LAYER....Pages 115-120
NUMERICAL STUDIES OF STREAK INSTABILITY IN BOUNDARY LAYERS....Pages 121-126
A POSSIBLE LINEAR INSTABILITY MECHANISM IN SMALL-SCALE PIPE FLOWS....Pages 127-132
EFFECTS OF STRONG ADVERSE PRESSURE GRADIENTS AND INCIDENT WAKES ON TRANSITION AND CALMING....Pages 133-138
EFFECT OF FREE-STREAM TURBULENCE ON A COMPRESSIBLE LAMINAR BOUNDARY LAYER....Pages 139-144
EFFECT OF VISCOSITY STRATIFICATION ON SECONDARY AND NONMODAL INSTABILITIES....Pages 145-151
SPECTRAL ELEMENT STABILITY ANALYSIS OF VORTICAL FLOWS....Pages 153-158
EXPERIMENTAL STUDY OF RESONANT INTERACTIONS OF INSTABILITYWAVES IN AN AIRFOIL BOUNDARY LAYER....Pages 159-169
KLEBANOFF MODES IN SWEPT BOUNDARY LAYERS....Pages 167-172
EFFECTS OF COMPRESSIBILITY AND NOSE RADIUS ON INSTABILITIES NEAR THE ATTACHMENT LINE OF SWEPT WINGS....Pages 173-179
TWO-DIMENSIONAL LOCAL INSTABILITY: COMPLETE EIGENVALUE SPECTRUM....Pages 181-188
INSTABILITY OF FLOW PAST A CASCADE OF CIRCULAR CYLINDERS....Pages 189-194
AWAVE DRIVER THEORY FOR VORTICAL WAVESPROPAGATINGACROSSJUNCTIONS BETWEEN RIGID AND COMPLIANTWALLS....Pages 195-200
OPTIMAL SUCTION DESIGN FOR HYBRID LAMINARFLOWCONTROL....Pages 201-206
TRANSITION CONTROL IN A FLAT-PLATE BOUNDARY LAYER....Pages 207-212
LINEAR FEEDBACK CONTROL OF TRANSITION IN SHEAR FLOWS....Pages 213-218
EFFECTS OF AMBIENT VISCOSITY ON THE ENTRAINMENT AND DYNAMICS OF A BUOYANT JET....Pages 219-224
DISTURBANCE DEVELOPMENT IN BOUNDARY LAYERS OVER COMPLIANT SURFACES....Pages 225-230
SUPPRESSION OF WALL TURBULENCE BASED ON STABILITY AND TURBULENCE ANALYSIS USING A COMPLIANT SURFACE....Pages 231-236
ROUGHNESS INDUCED TRANSIENT GROWTH: NONLINEAR EFFECTS....Pages 237-242
FEEDBACK CONTROL IN SPATIALLY GROWING BOUNDARY LAYERS....Pages 243-248
EFFECT OF ELASTIC SUPPORTS ONTHE CRITICAL VALUE OF REYNOLDS NUMBERPAST A CYLINDER....Pages 249-254
IMPROVEMENT OF LIFT-TO-DRAG RATIO OF THE AERO-TRAIN....Pages 255-260
IN-FLIGHT AND WIND TUNNEL MEASUREMENTS OF NATURAL AND OF CONTROLLED INSTABILITIES ON A LAMINAR FLOWAIRFOIL....Pages 261-266
INHERENT MECHANISM OF BREAKDOWN IN LAMINAR-TURBULENT TRANSITION.....Pages 267-273
EXPERIMENTAL AND NUMERICAL ANALYSIS OF UNSTEADY BOUNDARY LAYER TRANSITION USING CONTINUOUSWAVELET TRANSFORM....Pages 275-280
NONLINEAR NONLOCAL ANALYSIS OF CROSSβ FLOWβDOMINATED TRANSITION SCENARIOS USING DNSβLIKE RESOLUTION....Pages 281-286
THE EFFECT OF LENGTH SCALE OF FREE STREAM TURBULENCE ON BOUNDARY LAYER TRANSITION....Pages 287-292
UNSTEADY DISTURBANCE GENERATION AND AMPLIFICATION IN THE BOUNDARY-LAYER FLOW BEHIND A MEDIUM-SIZED ROUGHNESS ELEMENT....Pages 293-298
EXPERIMENTAL STUDY OF THE STABILIZATION OF TOLLMIEN-SCHLICHTINGWAVES BY FINITE AMPLITUDE STREAKS....Pages 299-304
DEVELOPMENT OF STREAMWISE STREAKS IN A QUASI-LAMINAR BOUNDARY LAYER DOWNSTREAM OF LOCALIZED SUCTION....Pages 303-310
THE TRANSITION TO TURBULENCE OF THE TORSIONAL COUETTE FLOW....Pages 311-316
NONLINEARWAVEPACKETS IN BOUNDARY LAYERS....Pages 317-322
APPLICABILITY OF LES MODELS FOR PREDICTION OF TRANSITIONAL FLOWSTRUCTURES....Pages 323-328
TURBULENT SPOTS IN A COMPRESSIBLE BOUNDARY-LAYER FLOW....Pages 329-334
ACTIVE BOUNDARY LAYER TRIPPING USING OSCILLATORY VORTICITY GENERATOR....Pages 335-340
RESONANT MODE INTERACTION IN A CANONICAL SEPARATED FLOW....Pages 341-348
STABILITY AND TRANSITION IN THE FLOW OFPOLYMER SOLUTIONS....Pages 349-354
EXPERIMENTAL STUDY OF TURBULENCE BEGINNING AND TRANSITION CONTROL IN A SUPERSONIC BOUNDARY LAYER ON SWEPT WING....Pages 355-361
TRANSITION INVESTIGATION ON HYPERSONIC FLAT-PLATE BOUNDARY LAYERS FLOWSWITH CHEMICAL AND THERMAL NON-EQUILIBRIUM....Pages 363-368
CHARACTERISTICS OF UNSTEADY DISTURBANCES DUE TO STREAMLINECURVATURE INSTABILITY IN A THREEDIMENSIONAL BOUNDARY LAYER....Pages 369-374
RECEPTIVITY OF SWEPT ATTACHMENT LINE BOUNDARY LAYER TO FREE-STREAM VORTICITY....Pages 375-381
OBSERVATIONS OF CROSSFLOW TRANSITION ON A SWEPT WING WITH GAW-2 AIRFOIL SECTION....Pages 383-388
DNS OF SEPARATION-INDUCED TRANSITION INFLUENCED BY FREE-STREAM FLUCTUATIONS....Pages 389-394
THE EFFECT OF SWEEP ON LAMINAR SEPARATION BUBBLES....Pages 395-400
ON THE BURSTING CRITERION FOR LAMINAR SEPARATION BUBBLES....Pages 401-407
NON-LINEAR INTERACTION OF GOERTLER VORTICES AND TOLLMIEN SCHLICHTING WAVES....Pages 409-414
BREAKDOWN OF A STREAK VIA DEVELOPMENT OF VARICOSE SECONDARY MODE ON THE STRAIGHT WING WITH PRESSURE GRADIENT....Pages 415-418
LINEAR OPTIMAL CONTROL OF TRANSITION IN PLANE CHANNEL FLOWSUSING DIFFERENT OBJECTIVE FUNCTIONS....Pages 419-424
ESTIMATOR-BASED CONTROL OF TRANSITION IN PLANE CHANNEL FLOWS USING VARIOUS COVARIANCE MATRICES....Pages 425-430
CONTROL OF TURBULENT BOUNDARY LAYERS BY UNIFORMWALL SUCTION AND BLOWING....Pages 431-436
STABILITY OF COMPLIANT PIPE FLOW TO AXISYMMETRIC AND NON-AXISYMMETRIC DISTURBANCES....Pages 437-442
LARGE EDDY SIMULATION OF ROTATING CHANNEL FLOW BY USING A NEW DYNAMIC ONE-EQUATION SUBGRID SCALE MODEL....Pages 443-446
....Pages 447-452
β¦ Subjects
Engineering Fluid Dynamics
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